Absorptive Neutral Density Filters UV-VIS-NIR

With their ability to minimize back-reflections and scattered light, absorptive neutral density (ND) filters are ideal for calibration. In contrast to the metallic type, absorption-type filters achieve their optical density by absorbing light within the substrate. For this reason, thickness is a key determinant of opacity. Because of their absorbing quality, these filters are suitable for low-power applications only.

Andover's absorbing ND filters are unique in that they are AR coated to reduce surface reflections. This enables them to be stacked without concern about losses and artifacts due to multiple reflections.

Please note that all of our Absorbing ND filters are also available in sets, which include a hardwood storage box.